In the first of two episodes in the rich tropical waters of the Indian Ocean, the team explores its remote and pristine underwater worlds.Expedition leader Paul Rose, environmentalist Philippe Cousteau Jr, maritime archaeologist Dr Lucy Blue, and marine biologist and oceanographer Tooni Mahto investigate how schools of manta ray suffering from shark bites are treated by the inhabitants of a remarkable reef. They go in search of one of the Indian Ocean s most elusive creatures, the dugong.The expedition visits the only coral nursery in this ocean, where an extraordinary technique is being used to repair damaged reefs.They investigate what is driving the increasing trade in shark fishing, and working with the British Met Office, they take part in a global experiment to collect vital information about the Indian Ocean.

The team explores the coastal waters of the Indian Ocean to discover what happens when the powerful Indian Ocean collides with the edge of a continent.Expedition Leader Paul Rose, Environmentalist Philippe Cousteau Jr, Maritime Archaeologist Dr Lucy Blue and Marine Biologist and Oceanographer Tooni Mahto search for one of the ocean s most mysterious creatures, the seahorse, to see how the population is fairing amid increasing demand from the eastern medicine market.They dive in search of the sunken remains of a medieval village, dragged into the sea by a cyclone; and the team works with scientists on a pioneering experiment to see how these coastal waters could help to predict natural disasters.Finally, they take part in a global experiment to help protect the largest fish in the sea - the whale shark.